ROBINSON. — MEXICAN PLANTS. 335 



E. fflaucum, Hemsl. 1. c. 95 (1881), not Sch. Bip. nor Klatt. 



E. CAPNORESBIUM, n. sp. 



£!. glaucum, Sch. Bip. in herb. 



Also under another unedited name by Schultz. 

 E. GLAUCUM, Khitt, Leopoklina, xx. 89 (188-4), not Sch. Bip. (nomen 



nudum) nor Ilemsl. (nomen nudum). 



K Orizabae, Sch. Bip. in Klatt, I.e. 90 (1884). 

 E. heterolepis. Soft woody stems glabrous, lucid : leaves opposite, 

 approximate, decussate, lance-oblong, entire, acute at each end, coriaceous, 

 1.2 to 1.4 dm. long, 3.6 to 4.8 cm. broad, nigrescent, pinnately and rather 

 obscurely veined, pulverulent under a good lens; petioles 2 to 3 cm. long; 

 heads 8 mm. long, 1 to 1.2 cm. in diameter, about 18-flowered, borne oq 

 filiform flexuous divergent pedicels in an open pyramidal panicle ; scales 

 of the involucre of two kinds, the inner loag, linear, acute, about equal- 

 ling the flowers, stramineous, at length deciduous; the outer (about 6 in 

 number) ovate to lanceolate, acutish, much shorter, persistent, nigrescent: 

 corollas 5 to 6 mm. long, with slender proper tube and distinctly en- 

 larged throat : pappus of about equal length, somewhat sordid ; achenes 

 glabrous, 2 mm. long. — Collected by Dr. Sereno Watson in " eastern 

 portions of Vera Paz and Chiquimula," Guatemala, 1885, no 65. Type 

 in herb. Gray. A very distinct species with a calyculate involucre re- 

 calling a Senerio. 



B. Heydeanum. Stems somewhat flattened, especially beneath the 

 nodes, striate, tomentulose above, soon glabrate and slightly scabrous : 

 leaves opposite, ovate to ovate-lanceolate, caudate-acuminate at the apex, 

 cuneate at the base, entire, 3-nerved from above the base, sordid-tomen- 

 tulose upon the nerves above, at first sordid-tomentose at length merely 

 jiubescent and slightly paler beneath, thin, 1.7 dm. long, 7 to 8 cm. broad ; 

 petioles sordid-tomentose, 4 to 9 cm. long : panicle opposite-branched, 

 rounded, terminal, 1 dm. broad ; heads about 22-fiowered, 9 mm. long, 

 short-pedicelled ; involucral scales linear, acute, about 16, loosely imbri- 

 cated, sordid-tomentulose on the outer surface, the outer shorter : corollas 

 5 to 6 mm. long, gradually enlarged from the base to the short-toothed 

 limb, without sharply differentiated throat: achenes slender, 5 mm. long, 

 hispidulous on the angles; pappus sordid, of nearly equal length. — E. 

 Ekrenberc/ii, Coulter in J. D. Smith, Enutn. PI. Guat. iv. 74, not Hemsl. 

 — Collected by Heyde & Lux on Rio de Las Canas, Depart. Santa Rosa, 

 Guatemala, altitude 800 m., March, 1892, no. 3427 of Mr. J. Donnell 

 Smith's sets. Type in herb. Gray, E. Ekrenhergii, Hemsl., has serrate 

 leaves, much larger beads, and broader involucral scales. 



